Illumination and Signaling system short?

[180fan]

background info:89 240sx with 155k

Problem:I think I've a short in my harness, but not totally sure. The problem is in the illumination and turn signaling sytems. When I turn on the combination switch to turn on the external lights or external lights with the headlights, the turn signals will turn on (not blinking). When the lights are on, I try to signal or turn on the emergency blinkers, they still do not blink, just makes one click sound and stays on. Now when the combination switch is off, and I try to signal or use the emergency signal, all the lights, including the one in my car stereo, my instrument cluster all blink. With the exception of one, the dome light. So if there's any one with any ideas that'd be awesome and greatly appreciated. Thanks ahead of time

[drjohn]

This may sound strange but check any recently replaced bulbs. A single element 1156 bulb in a dual element 1157 sockey will cause feed back through the dash lamps. Also check the grounds at the light sockets. Bad grds can cause strange problems such as this.